$\int\frac{9\sin\left(x\right)+4\sec\left(x\right)}{\tan\left(x\right)}dx$

$4x^2-24x+35$

$6a^2y+12by$

$\int_1^2\left(\left(x+1\right)e^{-2x}\right)dx$

$\lim_{x\to0}\left(\frac{2^{\frac{x}{2}}-1}{x}\right)$

$\frac{x^2-x\:+\:12}{-x+3}$

$\int\:\frac{1}{\sqrt{5}\left(v^2+1\right)}dv$